Issued Patents All Time
Showing 76–100 of 124 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862965 | Threadless well tool and method of making | — | 1989-09-05 |
| 4860991 | Safety valve | William A. Blizzard, Jr. | 1989-08-29 |
| 4854387 | Large bore retrievable well safety valve | — | 1989-08-08 |
| 4844166 | Method and apparatus for recompleting wells with coil tubing | Walter S. Going, III, Arthur J. Morris | 1989-07-04 |
| 4771831 | Liquid level actuated sleeve valve | Arthur J. Morris | 1988-09-20 |
| 4768539 | Pipeline safety valve | — | 1988-09-06 |
| 4760879 | Choke and kill control system | — | 1988-08-02 |
| 4724908 | Circulating kill valve | — | 1988-02-16 |
| 4722399 | Self closing equalizing valve for a subsurface well safety valve | — | 1988-02-02 |
| 4721162 | Fluid level controlled safety valve | Paul Black | 1988-01-26 |
| 4718488 | Pump-out plug system for a well conduit | Arthur J. Morris | 1988-01-12 |
| 4716969 | Hydraulic valve actuating means for subsurface safety valve | — | 1988-01-05 |
| 4716968 | Double seated well valve | — | 1988-01-05 |
| 4709762 | Variable fluid passageway for a well tool | — | 1987-12-01 |
| 4691776 | Retrievable well safety valve with expandable external seals | — | 1987-09-08 |
| 4688593 | Well reverse flow check valve | Arthur J. Morris | 1987-08-25 |
| 4676307 | Pressure charged low spread safety valve | — | 1987-06-30 |
| 4669547 | High temperature subsurface safety valve | — | 1987-06-02 |
| RE32390 | Hydraulic actuating means for subsurface safety valve | — | 1987-04-07 |
| 4629002 | Equalizing means for a subsurface well safety valve | — | 1986-12-16 |
| 4621695 | Balance line hydraulically operated well safety valve | — | 1986-11-11 |
| 4601342 | Well injection valve with retractable choke | — | 1986-07-22 |
| 4601341 | Flexible piston well safety valve | William D. Eatwell | 1986-07-22 |
| 4598773 | Fail-safe well safety valve and method | — | 1986-07-08 |
| 4577654 | Fluid actuated pipeline valve | — | 1986-03-25 |